Seiko Cal. 5611 - 630

The Seiko 5611-630 represents an important milestone in Seiko's 1971 lineup. With its 18mm lug width and 8.5mm profile, it sits comfortably on most wrists. [seikata-wm-e6433987c79a]

Also known as: Helmet, World Timer

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

8.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Silver

Jewels

21j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1971

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